of Nellis AFB, Nevada, crashes from low altitude when deficient wind-shield bulged down from the top of the canopy bow and instantly crazed. Tactical Air Command replaces 50 F-111 windshields in 1969 and 93 in 1970. 5 June Rivet Amber, the U.S. Air Force's sole Boeing RC-135E, 62-4137, c/n 18477, is lost over the Bering Sea near Alaska. This unique aircraft was the heaviest C-135 ever built and had a special radar weighing over 35,000 pounds and pod-mounted heat exchanger (right wing) and generator (left wing). Aircraft was approved for a return flight to the main operating base at Eielson AFB, AK for inspection of possible structural damage after a severe turbulence encounter on its previous operational sortie. About a half hour after takeoff the crew reported vibrations but indicated "aircraft under control." No further radio contact could be established. Nothing was ever found of the aircraft or the nineteen crewmen on board. 23 June A Soviet Air Force Antonov An-12BP, c/n 402503, callsign "05825", collides in mid-air with Aeroflot Flight 831, an Ilyushin Il-14M, over the Yukhnovsky district, Kaluga Oblast, Soviet Union. All 120 people on both aircraft perish in the crash. The pilot of the Ilyushin Il-14 had disobeyed ATC instructions to stay below and the An-12 had been flying slightly below . 18 September A U.S. Air Force twin engine Douglas C-47 Skytrain crashed just after takeoff from McChord AFB in Tacoma, Washington. It came down in a wooded area just south of the runway. Five men died and seven other men were injured. Killed were Army 1st Lt. Joseph R. Baxter, assigned to Madigan General Hospital at neighboring Ft. Lewis, who died six hours after the crash; Lt. Col. Robert E. Walker, pilot and commander of a detachment of the 15th Weather Squadron at McChord; the co-pilot, Capt. Peter Cunningham of Tacoma; Air Force TSgt. Donald G. Love, the flight engineer, also assigned to McChord and an Army man, who was not immediately identified. The injured Air Force personnel were MSgt. William B. Johnston of McChord; Lt. Co!. Jack S. McKinley of Virginia; Sgt. William D. Wallace of West Virginia; TSgt. Billy D. Byrd of Tucson, Arizona; and Sgt. Charles L. Andrews of Florida. Injured Navy personnel were P02.C. Charles B. Nichols of California, and PO3.C. Darrell E. Calentine of California. Also injured was a retired Air Force MSgt. Granville Hicks of Missouri. 20 September An